There does seem to be a little bit more to the story if you take Ico, another game by the same developers into account, which is believed to be its sequel despite being released first. The Last Gaurdian would seem to be connected somehow, as well, if they ever release it.
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About suffering they were never wrong,
The Old Masters: how well they understood
Its human position; how it takes place
While someone else is eating or opening a window or
just walking dully along...